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| Mirrors > Home > MPE Home > Th. List > Mathboxes > isorcl2 | Structured version Visualization version GIF version | ||
| Description: Reverse closure for isomorphism relations. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| isorcl.i | ⊢ 𝐼 = (Iso‘𝐶) |
| isorcl.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| isorcl2.b | ⊢ 𝐵 = (Base‘𝐶) |
| Ref | Expression |
|---|---|
| isorcl2 | ⊢ (𝜑 → (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isorcl.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) | |
| 2 | isorcl2.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐶) | |
| 3 | eqid 2766 | . . . . 5 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 4 | isorcl.i | . . . . . 6 ⊢ 𝐼 = (Iso‘𝐶) | |
| 5 | 4, 1 | isorcl 49852 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 6 | 2, 3, 5, 4 | isofval2 49851 | . . . 4 ⊢ (𝜑 → 𝐼 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))) |
| 7 | 6 | oveqd 7440 | . . 3 ⊢ (𝜑 → (𝑋𝐼𝑌) = (𝑋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌)) |
| 8 | 1, 7 | eleqtrd 2868 | . 2 ⊢ (𝜑 → 𝐹 ∈ (𝑋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌)) |
| 9 | eqid 2766 | . . 3 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦)) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦)) | |
| 10 | 9 | elmpocl 7664 | . 2 ⊢ (𝐹 ∈ (𝑋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ dom (𝑥(Inv‘𝐶)𝑦))𝑌) → (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) |
| 11 | 8, 10 | syl 18 | 1 ⊢ (𝜑 → (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 dom cdm 5666 ‘cfv 6543 (class class class)co 7423 ∈ cmpo 7425 Basecbs 17294 Invcinv 17827 Isociso 17828 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7426 df-oprab 7427 df-mpo 7428 df-1st 7995 df-2nd 7996 df-inv 17830 df-iso 17831 |
| This theorem is used by: isoval2 49854 catcisoi 50219 |
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